Network+ Lesson10 What is the network address and subnet mask of

What is the network address and subnet mask of a default route?

• 255.255.255.255/0

• 0.0.0.0/32

• 255.255.255.255/32

• 0.0.0.0/0

Answer explanation

The network address and subnet mask of a default route is 0.0.0.0/0.

Which of these in a modern network refers to an unpredictable variation in delay?

• Serialization delay

• Jitter

• Contention

• Congestion

Answer explanation

Jitter in a modern network refers to an unpredictable variation in delay.

Which routing protocol characteristic indicates the believability of the routing protocol when compared to other routing protocols?

• SPF algorithm

• Weight

• Metric

• Administrative distance

Answer explanation

The better the administrative distance, the more believable the protocol. Lower is better for the administrative distance (AD) score.

If a PC on an Ethernet network attempts to communicate with a host on a different subnet, what destination IP address and destination MAC address will be placed in the packet/frame header sent by the PC?

• Destination IP: IP address of the default gateway. Destination MAC: MAC address of the default gateway.

• Destination IP: IP address of the remote host. Destination MAC: MAC address of the local PC.

• Destination IP: IP address of the remote host. Destination MAC: MAC address of the remote host.

• Destination IP: IP address of the remote host. Destination MAC: MAC address of the default gateway.

Answer explanation

The destination IP address does not change in the packet. However, as the router sends the frame out of the exit interface heading toward the destination, it will update the destination media access control (MAC) address to the next hop/device. If a PC on an Ethernet network attempts to communicate with a host on a different subnet, the destination IP will be the IP address of the remote host, and the destination MAC will be the MAC address of the default gateway.

Which protocol is used to request a MAC address that corresponds to a known IPv4 address on the local network?

• ARP

• ICMP

• TTL

• IGMP

Answer explanation

Address Resolution Protocol (ARP) is used to request a media access control (MAC) address that corresponds to a known IPv4 address on the local network.

The RSVP protocol is associated with which overall approach to QoS in a modern network?

• Integrated Service (IntServ)

• DiffServ

• Best effort

• FIFO

Answer explanation

Integrated Service (IntServ) is often referred to as hard Quality of Service (QoS) because it can make strict bandwidth reservations. IntServ uses signaling among network devices to provide bandwidth reservations. Resource Reservation Protocol (RSVP) is an example of an IntServ approach to QoS. Because IntServ must be configured on every router along a packet’s path, the main drawback of IntServ is its lack of scalability.

Which of the following routing protocols is an EGP?

• OSPF

• RIP

• EIGRP

• BGP

Answer explanation

Border Gateway Protocol (BGP) is an Exterior Gateway Protocol (EGP) protocol that makes the Internet a reality.

Which of the following is a distance-vector routing protocol with a maximum usable hop count of 15?

• OSPF

• BGP

• EIGRP

• RIP

Answer explanation

Routing Information Protocol (RIP) is a distance-vector routing protocol with a maximum hop count of 15 and cannot be used in large networks for the same reason.